394639896 has 64 divisors (see below), whose sum is σ = 1153785600. Its totient is φ = 110130048.

The previous prime is 394639877. The next prime is 394639901. The reversal of 394639896 is 698936493.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20091 + ... + 34538.

It is an arithmetic number, because the mean of its divisors is an integer number (18027900).

Almost surely, 2^394639896 is an apocalyptic number.

It is an amenable number.

394639896 is an abundant number, since it is smaller than the sum of its proper divisors (759145704).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

394639896 is a wasteful number, since it uses less digits than its factorization.

394639896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54688 (or 54684 counting only the distinct ones).

The product of its digits is 7558272, while the sum is 57.

The square root of 394639896 is about 19865.5454493452. The cubic root of 394639896 is about 733.5003566301.

The spelling of 394639896 in words is "three hundred ninety-four million, six hundred thirty-nine thousand, eight hundred ninety-six".